John W. Schwieter is Professor of Spanish and Linguistics, cross-appointed in psychology, and Director of Bilingualism Matters @ Laurier and the Language Acquisition, Multilingualism, and Cognition Laboratory at Wilfrid Laurier University, Canada. He is also an Adjunct Professor of Linguistics at McMaster University, Canada, and is Executive Editor of Bilingual Processing and Acquisition (2016), Editor-in-Chief of Ampersand, and Co-Editor of Cambridge Elements in Second Language Acquisition (2019). Julia Festman is Professor of Multilingualism at the University College of Teacher Education Tyrol, Austria. Her main research focus is on multilingualism on the individual, cognitive and educational level. She combines psycholinguistic, and neuroscientific methods for investigating learning and processing of multiple languages. Her latest book, Second Language Acquisition and Lifelong Learning (2023), is coauthored with S. Pfenninger and D. Singleton.

'Our field was awaiting for a long time such a comprehensive volume that covers the whole topic of the cognitive neuroscience of bilingualism: From neurons to words and to cognitive functions. An outstanding work that should become a must-read for students and researchers.' Jubin Abutalebi, University Vita-Salute San Raffaele, Italy

• 1. Theories and methods in the cognitive neuroscience of bilingualism: an introduction; 2. Neural representations and language processing in the bilingual brain; 3. Bilingualism, language development, and brain plasticity; 4. Aphasia and the bilingual brain; 5. Cross-linguistic effects of bilingualism; 6. Bilingual lexical and conceptual memory; 7. Cognitive and neurocognitive effects of bilingualism; 8. Conclusion.